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LA Times / Freep - May 30, 2008

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat May 31, 2008 2:20 pm    Post subject: LA Times / Freep - May 30, 2008 Reply with quote
Still working on it ...
Code:
Puzzle: FP053008
+-------+-------+-------+
| . 2 8 | . 5 . | . . . |
| . . . | 9 . 8 | 5 . 6 |
| . . . | 2 7 . | . . . |
+-------+-------+-------+
| 7 . . | . . . | 4 . 3 |
| 5 4 . | . . . | . 6 7 |
| 3 . 6 | . . . | . . 2 |
+-------+-------+-------+
| . . . | . 1 9 | . . . |
| 9 . 7 | 8 . 4 | . . . |
| . . . | . 6 . | 7 9 . |
+-------+-------+-------+

Keith
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sat May 31, 2008 3:59 pm    Post subject: Reply with quote
very tough, here is a xy-chain approach
starting in r8c5 marked below...{23}-{13}-{18}-{89}-{29} ending in r5c3
eliminates 2 in r5c5

Code:
.------------------.------------------.------------------.
| 4     2     8    | 136   5     136  | 13    7     9    |
| 1     7     3    | 9     4     8    | 5     2     6    |
| 6     59    59   | 2     7     13   | 138   148   148  |
:------------------+------------------+------------------:
| 7     189   129  | 56    289   56   | 4    #18    3    |
| 5     4    #29   | 13   -2389  123  |#89    6     7    |
| 3     189   6    | 4     89    7    | 189   5     2    |
:------------------+------------------+------------------:
| 28    356   45   | 7     1     9    | 26    348   458  |
| 9     1356  7    | 8    #23    4    | 26   #13    15   |
| 28    13    14   | 35    6     235  | 7     9     148  |
'------------------'------------------'------------------'


then...


Code:
.------------------.------------------.------------------.
| 4     2     8    | 136   5     136  | 13    7     9    |
| 1     7     3    | 9     4     8    | 5     2     6    |
| 6     59    59   | 2     7     13   | 138   148   148  |
:------------------+------------------+------------------:
| 7     189   129  | 56    289   56   | 4    #18    3    |
| 5     4     29   | 13    389   123  | 89    6     7    |
| 3     189   6    | 4     89    7    | 189   5     2    |
:------------------+------------------+------------------:
|#28    356   45   | 7     1     9    |#26   34-8   458  |
| 9     1356  7    | 8    #23    4    |#26   #13    15   |
| 28    13    14   | 35    6     235  | 7     9     148  |
'------------------'------------------'------------------'


xy-chain starting in r4c8...{18}-{13}-{23}-{26}-{26}-{28} ending in r7c1 marked above. eliminates the 8 in r8c8

finally...
Code:
.------------------.------------------.------------------.
| 4     2     8    | 136   5     136  | 13    7     9    |
| 1     7     3    | 9     4     8    | 5     2     6    |
| 6     59    59   | 2     7     13   | 138   148   14   |
:------------------+------------------+------------------:
| 7     189   129  | 56    289   56   | 4     18    3    |
| 5     4     29   | 13    389   123  | 89    6     7    |
| 3     189   6    | 4     89    7    | 189   5     2    |
:------------------+------------------+------------------:
| 28    356  #45   | 7     1     9    | 26   #34   4-58  |
| 9     1356  7    | 8     23    4    | 26   #13   #15   |
| 28    13    14   | 35    6     235  | 7     9     148  |
'------------------'------------------'------------------'


xy-chain starting in r8c9...{15}-{13}-{34}-{45} ending in r7c3 eliminates the 5 in r7c9
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat May 31, 2008 4:29 pm    Post subject: Reply with quote
I had a W-wing, XYZ-wing, and an extended XY-wing.
Code:
+----------------+----------------+----------------+
| 4    2    8    | 136  5    136  | 13   7    9    |
| 1    7    3    | 9    4    8    | 5    2    6    |
| 6    59   59   | 2    7    13   | 138  148  148  |
+----------------+----------------+----------------+
| 7    189  129  | 56   289  56   | 4    18   3    |
| 5    4    29   | 13   2389 123  | 89   6    7    |
| 3    189  6    | 4    89   7    | 189  5    2    |
+----------------+----------------+----------------+
| 28   356@ 45   | 7    1    9    | 26   348@ 458  |
| 9   -1356 7    | 8    23   4    | 26   13#  15   |
| 28   13#  14   | 35   6    235  | 7    9   -148  |
+----------------+----------------+----------------+

The W-wing takes out <1> in R8C2 and R9C9.

This reveals an XYZ-wing <458> that takes out <4> in R7C8.

The extended XY-wing is then in R79: {38}, {48}, {13 + 14 = 34}. It takes out <3> in R7C2.

(Edited to correctly describe extended XY-wing.)


Keith

Last edited by keith on Sat May 31, 2008 5:58 pm; edited 3 times in total
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Johan



Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
PostPosted: Sat May 31, 2008 4:55 pm    Post subject: Reply with quote
The extra digits(+) in the 89 UR* in R46C25 are creating two pincer cells for digit <3> in R9C2(a) and R8C5(b), eliminating <3> in R9C46 and R8C2, collapsing the whole puzzle

Code:
+-------------------------+-------------------------+-------------------------+
| 4        2         8    | 136       5       136   | 13         7       9    |
| 1        7         3    | 9         4       8     | 5          2       6    |
| 6        59        59   | 2         7       13    | 138        148     148  |
+-------------------------+-------------------------+-------------------------+
| 7      * 89+1      129  | 56      * 89+2    56    | 4          18      3    |
| 5        4         29   | 13        2389    123   | 89         6       7    |
| 3      * 89+1      6    | 4       * 89      7     | 189        5       2    |
+-------------------------+-------------------------+-------------------------+
| 28       356       45   | 7         1       9     | 26         348     458  |
| 9        1-[3]56   7    | 8         2=3 b   4     | 26         13      15   |
| 28       1=3 a     14   |-[3]5      6       2-[3]5| 7          9       148  |
+-------------------------+-------------------------+-------------------------+
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CORUJA



Joined: 16 Jun 2007
Posts: 15
Location: BRUMADINHO - MG; BRAZIL
PostPosted: Mon Jun 02, 2008 7:16 pm    Post subject: LA TIMES/FREEP MAY 30 Reply with quote
Johan wrote:
The extra digits(+) in the 89 UR* in R46C25 are creating two pincer cells for digit <3> in R9C2(a) and R8C5(b), eliminating <3> in R9C46 and R8C2, collapsing the whole puzzle


Wow!!!
Coruja.

(Edited by Marty to add ending quote tag)
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